There's a bit of a stink going on - even in major media - about something iOS 4's been doing. Apparently, iOS 4 has been storing a list of locations and timestamps to a hidden, but readable file in a standard database format. The locations are triangulated using cell towers, and generally aren't as accurate as for instance GPS. Still, the file is stored without any form of protection on both your iPhone as well as your desktop.

The issue here is one of "informed consent," a basic legal principle in a free society.

Apple Inc. would have had no problem if they had merely made it clear to users they were doing this. Instead they offer an opaque "privacy policy" that masks what they're really up to.

I often see comments saying "if you have nothing to hide you have nothing to fear." But in this case it should be phrased as "if Apple had nothing to hide, they had nothing to fear" by making this tracking known to their customers.